Water-tube boiler.



PAT'BNT'ED JUNE 16, 1903'.

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WATER TUBE BGILER.

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uoooooooooooqoo No. 731,211. PATENTED rJUNE'l, y19703. J. J) OBRIEN.

WATER TUBE BOILER.

APPLIQATION H'Lnn MAR, so, 190s.

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zontal section taken on line III III, Fig. I.

' eted or otherwise secured to the lower part UNITED l STATES Patented June 16, 1903.

PATENT `OEEICE.

JOHNA J. OISRIEN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO JOHN OBRIEN.

BOILER WORKS COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No.1731,211, dated June 16, 1903.

Application filed March 30, 1903.

To @ZZ whom, t may concern.-

Be it known that I, JOHN J. OBRIEN, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Water-Tube Boilers, yof which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

The object of my invention is to so construct a boiler as to provide for an improved circulation of the water through the main drum, the water-legs, and the tubes of the boiler.

My invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Figure I is a side elevation illustrative of my invention. Fig. II is an enlarged detail section showing the lower end of the front water-leg, the front manifold, the connectionv between the manifold and the leg, the front end of one of the lower water-tubes that connect the water-legs together, and the end of one of the tubes that connect the manifolds together. Fig. III is an enlarged detail hori- Referring to the drawings, l represents the main drum of the boiler; 2, the rear waterleg; 3, the front water-leg;A 4, the water-tubes that connect the legs together; 5, the inner manifold; 6, the outer manifold, and 7 the tubes that connect the manifolds together.

The outer manifold 6 is connected by pipes 8 (one at each end of the manifold and preferably one or more intermediate ones) to the front Water-leg 3 by means of nipples 9, rivof the inner sheet of the water-leg and into which the upper ends of the tubes Sare tapped. The lower row of water-tubes 4 connect with Serial No. 150,132. (No model.)

the nipples 9 at their forward ends, as shown clearly in Fig. II.

The inner manifold 5 is connected by pipes or tubes 10 to the drum l.

When the boiler is in use, there is a circulation of water rearwardly through the drum 1, down the inner water-leg, forwardly through all of the tubes 4, except part of the lower row, into the front water-leg, and upwardly through the front water-leg into the drum. At the same time there is a free and Iundisturbed circulation of water from the inner Water-leg forwardly through part of the lower row of tubes into the nipples 9, down through the pipes 8, through the front manifold, through the tubes 7 into the inner manifold, and up through the pipes lO into the drum l.

It has been found by actual experience that by thus constructing a boiler the gurgling and bubbling of Water in the lower front manifold, which was common in the old construction, is avoided, and the front manifold is much less liable to be burned out, as the circulation of water is much improved.

I claim as my invention- In a water-tube boiler, the combination of aydrum, front-and rear Water-legs, inner and outer manifolds, pipes connecting the inner manifold to the drum, nipples connected to the front water-leg, pipes connecting said nipples to the outer manifold, and pipes connecting the manifolds together; part of the lower row of water-tubes forming a connection between the rear water-leg and said nipples, and the water-tubes above the lower row connecting the water-legs together, substantially as set forth.

v J OI-IN J. OBRIEN.

In presence of- E. S. KNIGHT, M. P. SMITH. 

